SARA / Free Tools / CVE / CVE-2017-16932

CVE-2017-16932 — parser

parser.c in libxml2 before 2.9.5 does not prevent infinite recursion in parameter entities.

CVSS

7.5 HIGH

EPSS

6.45% (top 6.40%)

CWE

—

Published

2017-11-23T21:29:00.437

Last modified

2026-10-14T07:16:39.660

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

01What is this vulnerability?

parser.c in libxml2 before 2.9.5 does not prevent infinite recursion in parameter entities.

No structured affected-product list available — see references below for vendor advisories.

Not currently listed on the CISA Known Exploited Vulnerabilities (KEV) catalog. EPSS is the best forward-looking signal — see the EPSS row above.

Patch to a fixed version listed in the vendor advisory (see references below).
Mitigate with WAF rules, network egress filters, or feature flags where the patch is not yet available.
Hunt historical logs for exploitation indicators — see Detection signatures below.

For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.

Ask SARA in chat to draft a starting detection for this CVE in your stack of choice.

No directly-cited follow-up CVEs in the KB record for this advisory. The references list in section 09 carries the vendor cross-references.

xmlsoft.org — http://xmlsoft.org/news.html
blog.clamav.net — https://blog.clamav.net/2018/07/clamav-01001-has-been-released.html
bugzilla.gnome.org — https://bugzilla.gnome.org/show_bug.cgi?id=759579
github.com — https://github.com/GNOME/libxml2/commit/899a5d9f0ed13b8e32449a08a361e0de127dd961
gitlab.gnome.org — https://gitlab.gnome.org/GNOME/libxml2/-/commit/899a5d9f0ed13b8e32449a08a361e0de…
lists.apache.org — https://lists.apache.org/thread.html/r58af02e294bd07f487e2c64ffc0a29b837db5600e3…
lists.apache.org — https://lists.apache.org/thread.html/rf4c02775860db415b4955778a131c2795223f61cb8…
lists.debian.org — https://lists.debian.org/debian-lts-announce/2017/11/msg00041.html
lists.debian.org — https://lists.debian.org/debian-lts-announce/2022/04/msg00004.html
usn.ubuntu.com — https://usn.ubuntu.com/3739-1/

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